Finding the Fourth Proportional to 109,397.10, 164,047.05 and 42,815.10

Step by Step Solution

1. Step 1: Write the proportion equation
   109,397.10 : 164,047.05 = 42,815.10 : x
2. Step 2: Convert to fraction form
   109,397.10/164,047.05 = 42,815.10/x
3. Step 3: Cross multiply
   109,397.10x = 164,047.05 × 42,815.10
4. Step 4: Simplify right side
   109,397.10x = 7,023,690,850.46
5. Step 5: Solve for x
   x = 7,023,690,850.46/109,397.10
6. Step 6: Final answer
   x = 64,203.63